Integrated differential system and vehicle

Abstract

The utility model provides an integrated differential system and a vehicle, and relates to the technical field of automobiles, the integrated differential system comprises a differential mechanism, an input shaft, a locking and disconnecting device and an output shaft; the locking and disconnecting device is arranged between the input shaft and the output shaft and comprises a shell, a first combination sleeve, a second combination sleeve, an electromagnetic structure, a first elastic piece and a second elastic piece. Through cooperation of the electromagnetic structure, the first elastic piece and the second elastic piece, the first combination sleeve and the second combination sleeve can be driven to slide relative to the input shaft so as to change the axial position, so that the connection state between the first combination sleeve and the differential shell and the connection state between the second combination sleeve and the output shaft are changed, and finally three working modes are achieved. According to the integrated differential system, the two combination sleeves are controlled through one electromagnetic structure, bidirectional control is achieved, the structure is simplified, the cost is low, meanwhile, three working modes are integrated, and the comprehensive requirements of disconnection and differential locks can be met.

Description

Technical Field

[0001] This application relates to the technical field of automobiles, and particularly relates to an integrated differential system and a vehicle. Background Art

[0002] Currently, the powertrain of most hybrid vehicles is an all-wheel drive system (AWD), and all wheels are involved in driving the vehicle. Some models are mainly front-wheel drive, and some models are mainly rear-wheel drive. Taking a front-wheel drive vehicle as an example, the front axle engine is the main power source, and a P4 motor is arranged on the rear axle as an auxiliary drive. To reduce energy consumption, increase the vehicle's driving range, reduce motor losses, extend the life of the inverter, and reduce component wear, it is extremely urgent to set up a disconnecting device.

[0003] Currently, the disconnecting mechanism and the differential lock function mainly exist independently. The main components of the disconnecting mechanism are the dog-tooth type and the one-way clutch type. Among them, the execution mode is to drive the worm and gear, ball screw, cam, etc. through the motor, electromagnetic, pneumatic, or hydraulic drive, and the combination design can be carried out according to different power sources and actuators. The common design of the differential lock is the fork cooperating with the dog teeth, and the electromagnet cooperating with the dog teeth scheme. Currently, the disconnecting mechanism and the differential lock usually cannot be implemented simultaneously on a single vehicle, and cannot meet the comprehensive requirements of disconnection and differential lock at the same time. Utility Model Content

[0004] In view of this, this application aims to propose an integrated differential system to solve the problem that the existing differential system cannot meet the comprehensive requirements of disconnection and differential lock at the same time.

[0005] To achieve the above object, the technical solution of this application is realized as follows:

[0006] An integrated differential system includes a differential, an input shaft, a locking and disconnecting device, and an output shaft; the output end of the differential is connected to the input shaft, and the locking and disconnecting device is arranged between the input shaft and the output shaft;

[0007] The locking and disconnecting device includes: a housing sleeved outside the input shaft; a first coupling sleeve and a second coupling sleeve, both sleeved on the input shaft and both capable of sliding axially relative to the input shaft, the first coupling sleeve is movably connected to the differential housing, and the second coupling sleeve is movably connected to the output shaft; a driving component installed inside the housing for driving the first coupling sleeve and the second coupling sleeve to slide axially along the input shaft, so that the first coupling sleeve is connected to or disconnected from the differential housing, and the second coupling sleeve is connected to or disconnected from the output shaft;

[0008] The integrated differential system includes a first state, a second state, and a third state; in the first state, the first engaging sleeve is disconnected from the differential housing, and the second engaging sleeve is connected to the output shaft; in the second state, the first engaging sleeve is connected to the differential housing, and the second engaging sleeve is connected to the output shaft; in the third state, the first engaging sleeve is disconnected from the differential housing, and the second engaging sleeve is disconnected from the output shaft.

[0009] Furthermore, permanent magnet structures are provided on both the first engaging sleeve and the second engaging sleeve;

[0010] The driving assembly includes:

[0011] An electromagnetic structure, installed inside the housing and located between the first engaging sleeve and the second engaging sleeve; the electromagnetic structure is configured to drive the first engaging sleeve to slide towards the differential housing after a current in a first direction is applied, so that the first engaging sleeve is connected to the differential housing; or, to drive the second engaging sleeve to slide away from the output shaft after a current in a second direction is applied, so that the second engaging sleeve is disconnected from the output shaft;

[0012] A first elastic member and a second elastic member, both installed on the input shaft; the first elastic member is connected to the first engaging sleeve and is configured to drive the first engaging sleeve to slide away from the differential housing after the electromagnetic structure is de-energized, so that the first engaging sleeve is disconnected from the differential housing; the second elastic member is connected to the second engaging sleeve and is configured to drive the second engaging sleeve to slide towards the output shaft after the electromagnetic structure is de-energized, so that the second engaging sleeve is connected to the output shaft.

[0013] Furthermore, a first connecting member is provided between the first engaging sleeve and the differential housing, one end of the first connecting member is connected to the differential housing, and the other end is movably connected to the first engaging sleeve; a second connecting member is provided between the second engaging sleeve and the output shaft, one end of the second connecting member is movably connected to the second engaging sleeve, and the other end is connected to the output shaft.

[0014] Furthermore, a first end face tooth is provided on one side of the first engaging sleeve facing the first connecting member, and a third end face tooth meshing with the first end face tooth is provided on one side of the first connecting member facing the first engaging sleeve.

[0015] Furthermore, a second end face tooth is provided on one side of the second engaging sleeve facing the second connecting member, and a fourth end face tooth meshing with the second end face tooth is provided on one side of the second connecting member facing the second engaging sleeve.

[0016] Furthermore, a first mounting portion is provided on the input shaft, and the first mounting portion is disposed on a side of the first coupling sleeve away from the electromagnetic structure; the first elastic member includes a first spring, one end of the first spring is connected to the first mounting portion, and the other end is connected to the first coupling sleeve.

[0017] Furthermore, a second mounting portion is provided on the input shaft, and the second mounting portion is disposed on a side of the second coupling sleeve close to the electromagnetic structure; the second elastic member includes a second spring, one end of the second spring is connected to the second mounting portion, and the other end is connected to the second coupling sleeve.

[0018] Furthermore, a limiting member is further provided on the input shaft, and the limiting member is disposed on a side of the first coupling sleeve close to the electromagnetic structure, and the limiting member is used for axially limiting the first coupling sleeve.

[0019] Furthermore, the first coupling sleeve is connected to the input shaft by splines, and the second coupling sleeve is connected to the input shaft by splines.

[0020] Furthermore, the electromagnetic structure includes an iron core and a coil wound around the outer periphery of the iron core.

[0021] Compared with the prior art, the integrated differential system described in this application has the following advantages:

[0022] (1) The integrated differential system described in this application includes a differential, an input shaft, a lock-up disconnect device, and an output shaft; the lock-up disconnect device is disposed between the input shaft and the output shaft and includes a housing, a first coupling sleeve, a second coupling sleeve, and a driving component. By driving the first coupling sleeve and the second coupling sleeve to slide axially along the input shaft, the respective axial positions of the first coupling sleeve and the second coupling sleeve are changed, so as to change the connection states between the first coupling sleeve and the differential housing and between the second coupling sleeve and the output shaft, and finally realize three working modes of the integrated differential system: when the first coupling sleeve is disconnected from the differential housing and the second coupling sleeve is connected to the output shaft, it is the differential mode; when the first coupling sleeve is connected to the differential housing and the second coupling sleeve is connected to the output shaft, it is the lock-up mode; when the first coupling sleeve is disconnected from the differential housing and the second coupling sleeve is disconnected from the output shaft, it is the disconnect mode. The integrated differential system described in this application integrates three working modes in the same structure, solves the limitations and singularity of conventional differential products, and can simultaneously meet the comprehensive requirements of disconnection and differential lock.

[0023] (2) In the integrated differential system described in this application, permanent magnetic structures are provided on both the first engaging sleeve and the second engaging sleeve. The driving assembly includes an electromagnetic structure, a first elastic member, and a second elastic member. By passing currents in different directions through the electromagnetic structure to generate different magnetic fields, an attracting or repelling effect is produced on the first engaging sleeve or the second engaging sleeve integrated with the permanent magnetic structure, so as to be able to drive the first engaging sleeve or the second engaging sleeve to slide and change its axial position. After the electromagnetic structure is powered off, the first elastic member and the second elastic member can respectively drive the first engaging sleeve and the second engaging sleeve to reset. The electromagnetic structure is arranged between the first engaging sleeve and the second engaging sleeve. By using one electromagnetic structure to control two engaging sleeves to achieve two-way control, the total assembly cost can be effectively reduced; the differential lock and disconnection functions are realized through two engaging sleeves, which can achieve precise positioning and solve the problem of non-positioning in the middle position existing in the prior art when using a single gear sleeve to achieve three working positions.

[0024] Another object of this application is to propose a vehicle, including the integrated differential system as described above.

[0025] Compared with the prior art, the vehicle described in this application has the following advantages:

[0026] Due to the above differential system, the vehicle can achieve three different working modes, which can cover the current customers' urban commuting and off-road needs, and improve the driving experience and customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0028] Figure 1 is a schematic structural diagram of the integrated differential system described in the embodiment of this application;

[0029] Figure 2 is a schematic diagram of the power transmission path of the integrated differential system described in the embodiment of this application in the differential mode;

[0030] Figure 3 is a schematic diagram of the power transmission path of the integrated differential system described in the embodiment of this application in the locking mode;

[0031] Figure 4 is a schematic diagram of the power transmission path of the integrated differential system described in the embodiment of this application in the disconnection mode.

[0032] Description of the reference numerals:

[0033] 1. Differential housing; 2. Input shaft; 21. First mounting portion; 22. Second mounting portion; 30. Housing; 31. First coupling sleeve; 32. Second coupling sleeve; 33. Electromagnetic structure; 34. First spring; 35. Second spring; 36. First connecting member; 37. Second connecting member; 23. Limiting member; 41. First bearing; 42. Second bearing; 43. Third bearing; 44. Fourth bearing. Detailed implementation manners

[0034] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0035] In addition, in the embodiments of the present application, the orientation or positional relationship indicated by "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application. In addition, relational terms such as "first" and "second" are only used to distinguish one entity from another entity, and do not necessarily require or imply any actual relationship or order between these entities, nor can they be construed as indicating or implying relative importance.

[0036] The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0037] In the related art, currently, the disconnecting mechanism and the differential lock function mainly exist separately. The main acting components of the disconnecting mechanism are the dog tooth type and the one-way clutch type. Among them, the execution mode is driven by a motor / electromagnet / pneumatic / hydraulic drive turbine worm / ball screw / cam, etc., and can be combined and designed according to different power sources and actuators. The common design of the differential lock is the fork cooperating with the dog teeth, and the electromagnet cooperating with the dog teeth scheme. Currently, the disconnecting mechanism and the differential lock usually cannot be implemented simultaneously on a single vehicle, and cannot meet the comprehensive requirements of disconnection and differential lock at the same time.

[0038] In view of this, the embodiments of the present application provide an integrated differential system.

[0039] See Figure 1 , an integrated differential system, including a differential, an input shaft 2, a locking and disconnecting device, and an output shaft; the output end of the differential is connected to the input shaft 2, and the locking and disconnecting device is arranged between the input shaft 2 and the output shaft;

[0040] The locking and disconnecting device includes: a housing 30 sleeved outside the input shaft 2; a first engaging sleeve 31 and a second engaging sleeve 32, both sleeved on the input shaft 2 and both capable of sliding axially relative to the input shaft 2, wherein the first engaging sleeve 31 is movably connected to the differential housing 1, and the second engaging sleeve 32 is movably connected to the output shaft; a driving assembly installed inside the housing 30 for driving the first engaging sleeve 31 and the second engaging sleeve 32 to slide axially along the input shaft 2 so as to connect or disconnect the first engaging sleeve 31 from the differential housing 1 and connect or disconnect the second engaging sleeve 32 from the output shaft.

[0041] The integrated differential system includes a first state, a second state and a third state; in the first state, the first engaging sleeve 31 is disconnected from the differential housing 1, and the second engaging sleeve 32 is connected to the output shaft; in the second state, the first engaging sleeve 31 is connected to the differential housing 1, and the second engaging sleeve 32 is connected to the output shaft; in the third state, the first engaging sleeve 31 is disconnected from the differential housing 1, and the second engaging sleeve 32 is disconnected from the output shaft.

[0042] Specifically, referring to Figure 1 , the input end of the input shaft 2 is connected to the output half shaft gear of the differential, and the connection between the output end of the input shaft 2 and the output shaft is movable. The locking and disconnecting device is arranged between the input shaft 2 and the output shaft and can change the connection state between the input shaft 2 and the output shaft. The locking and disconnecting device includes a housing 30 sleeved outside the input shaft 2, and a first engaging sleeve 31, a second engaging sleeve 32 and a driving assembly are arranged inside the housing 30. The first engaging sleeve 31 and the second engaging sleeve 32 are both coaxially sleeved on the input shaft 2 and both are slidably connected to the input shaft 2. Among them, the first engaging sleeve 31 is arranged close to the differential side and can be connected or disconnected from the differential housing 1 by axial sliding, and the second engaging sleeve 32 is arranged close to the output shaft side and can be connected or disconnected from the output shaft by axial sliding. The driving assembly is used to drive the first engaging sleeve 31 and the second engaging sleeve 32 to slide axially along the input shaft 2, so that the first engaging sleeve 31 and the second engaging sleeve 32 change their respective axial positions, thereby changing the connection states between the first engaging sleeve 31 and the differential housing 1 and between the second engaging sleeve 32 and the output shaft, and finally realizing three different working modes.

[0043] Specifically, when the first coupling sleeve 31 is disconnected from the differential housing 1 and the second coupling sleeve 32 is connected to the output shaft, after the power is transmitted along the input shaft 2 to the first coupling sleeve 31 and the second coupling sleeve 32, it continues to be transmitted along the output shaft to the wheel end. At this time, the system is in the first state, which is the normal differential mode, and can ensure the power transmission and the speed difference requirements of the left and right wheels; when the first coupling sleeve 31 is connected to the differential housing 1 and the second coupling sleeve 32 is connected to the output shaft, the differential housing 1, the input shaft 2 and the output shaft are connected simultaneously, and the power is directly transmitted from the differential housing 1 to the output shaft. At this time, the system is in the second state, which is the locking mode, and can assist the vehicle to get out of trouble; when the first coupling sleeve 31 is disconnected from the differential housing 1 and the second coupling sleeve 32 is disconnected from the output shaft, after the power is transmitted along the input shaft 2 to the first coupling sleeve 31 and the second coupling sleeve 32, it cannot continue to be transmitted to the output shaft. At this time, the system is in the third state, which is the disconnect mode, and can prevent the situation that a certain drive axle is dragged backward when it does not participate in the work, meeting the fuel-saving requirements under high-speed working conditions.

[0044] Further, permanent magnet structures are provided on both the first coupling sleeve 31 and the second coupling sleeve 32;

[0045] The drive assembly includes:

[0046] An electromagnetic structure 33, installed inside the housing 30 and located between the first coupling sleeve 31 and the second coupling sleeve 32; the electromagnetic structure 33 is used to drive the first coupling sleeve 31 to slide towards the differential housing 1 after passing a current in the first direction, so that the first coupling sleeve 31 is connected to the differential housing 1; or, drive the second coupling sleeve 32 to slide away from the output shaft after passing a current in the second direction, so that the second coupling sleeve 32 is disconnected from the output shaft;

[0047] A first elastic member and a second elastic member, both installed on the input shaft 2; the first elastic member is connected to the first coupling sleeve 31 and is used to drive the first coupling sleeve 31 to slide away from the differential housing 1 after the electromagnetic structure 33 is powered off, so that the first coupling sleeve 31 is disconnected from the differential housing 1; the second elastic member is connected to the second coupling sleeve 32 and is used to drive the second coupling sleeve 32 to slide towards the output shaft after the electromagnetic structure 33 is powered off, so that the second coupling sleeve 32 is connected to the output shaft.

[0048] Specifically, in this embodiment, permanent magnet structures are respectively integrated on the first coupling sleeve 31 and the second coupling sleeve 32. The electromagnetic structure 33 is mounted on the inner wall of the housing 30 of the locking and disconnecting device through a first snap ring and is located between the first coupling sleeve 31 and the second coupling sleeve 32. The electromagnetic structure 33 includes an iron core and a coil wound around the outer periphery of the iron core. When currents in different directions are passed through the coil, the electromagnetic structure 33 can generate different magnetic fields, which act on the permanent magnet structures on the first coupling sleeve 31 or the second coupling sleeve 32, thereby generating an attractive or repulsive force on the first coupling sleeve 31 or the second coupling sleeve 32, driving the first coupling sleeve 31 or the second coupling sleeve 32 to slide axially in a specific direction. The first elastic member and the second elastic member are mounted on the input shaft 2 and are respectively connected to the first coupling sleeve 31 and the second coupling sleeve 32, and are used to drive the first coupling sleeve 31 and the second coupling sleeve 32 to reset respectively when the electromagnetic structure 33 is powered off.

[0049] See Figure 2 , when the electromagnetic structure 33 is not powered on, the first coupling sleeve 31 is in the first working position at the right end, is in contact with the electromagnetic structure 33, and is disconnected from the differential housing 1. The second coupling sleeve 32 is also in the first working position at the right end, is separated from the electromagnetic structure 33, and is connected to the output shaft. At this time, both the first elastic member and the second elastic member are in the natural state, neither stretched nor compressed. The power is transmitted from the input shaft 2, the second coupling sleeve 32 to the output shaft to achieve the normal differential function;

[0050] See Figure 3 , when a current in the first direction is passed through the electromagnetic structure 33, the magnetic field generated by the electromagnetic structure 33 generates repulsive forces on both the first coupling sleeve 31 and the second coupling sleeve 32. At this time, the second coupling sleeve 32 is still in the first working position at the right end, is separated from the electromagnetic structure 33, and is connected to the output shaft. While the first coupling sleeve 31 will slide towards the differential housing 1 to the second working position at the left end under the repulsive action of the electromagnetic structure 33. At the same time, the first elastic member is compressed. The first coupling sleeve 31 is separated from the electromagnetic structure 33 and is connected to the differential housing 1. Furthermore, the differential housing 1, the first coupling sleeve 31, the input shaft 2, the second coupling sleeve 32, and the output shaft are all locked to achieve the locking function; when the electromagnetic structure 33 is powered off, the magnetic field disappears, and the first elastic member will push the first coupling sleeve 31 to slide back to the first working position at the right end;

[0051] See Figure 4, when a current in the second direction, i.e., opposite to the first direction, is passed through the electromagnetic structure 33, the magnetic field generated by the electromagnetic structure 33 generates an attractive force on both the first engaging sleeve 31 and the second engaging sleeve 32. At this time, the first engaging sleeve 31 still remains at the first working position at the right end, fits with the electromagnetic structure 33, and disconnects from the differential housing 1. However, the second engaging sleeve 32 will slide away from the output shaft to the second working position at the left end under the attraction of the electromagnetic structure 33. At the same time, the second elastic member is compressed, the second engaging sleeve 32 fits with the electromagnetic structure 33, and disconnects from the output shaft. The power cannot continue to be transmitted to the output shaft after being transmitted from the input shaft 2 to the second engaging sleeve 32, realizing the disconnection function; when the electromagnetic structure 33 is powered off, the magnetic field disappears, and the second elastic member will push the second engaging sleeve 32 to slide back to the first working position at the right end in the reverse direction.

[0052] In the integrated differential system described in this embodiment, with the coordinated arrangement of the electromagnetic structure 33, the first elastic member, and the second elastic member, by controlling the power-on direction and the power-on / off state of the electromagnetic structure 33, it is possible to drive the first engaging sleeve 31 and the second engaging sleeve 32 to slide relative to the input shaft 2, thereby changing their respective axial positions, and further changing the connection states between the first engaging sleeve 31 and the differential housing 1 and between the second engaging sleeve 32 and the output shaft. Finally, three different working modes are realized, simultaneously meeting the comprehensive requirements of disconnection and differential lock.

[0053] Furthermore, a first connecting member 36 is provided between the first engaging sleeve 31 and the differential housing 1. One end of the first connecting member 36 is connected to the differential housing 1, and the other end is movably connected to the first engaging sleeve 31; a second connecting member 37 is provided between the second engaging sleeve 32 and the output shaft. One end of the second connecting member 37 is movably connected to the second engaging sleeve 32, and the other end is connected to the output shaft.

[0054] To further facilitate the connection between the first engaging sleeve 31 and the differential housing 1 and between the second engaging sleeve 32 and the output shaft, a first connecting member 36 and a second connecting member 37 are provided in this embodiment. Specifically, as Figure 1 shown, the first connecting member 36 is a connecting shaft sleeve sleeved on the input shaft 2. The left end of the connecting shaft sleeve is connected to the differential housing 1 through a spline, and the right end is movably connected to the first engaging sleeve 31. A first bearing 41 is provided between the connecting shaft sleeve and the input shaft 2 for radial support, and a second bearing 42 is provided between the connecting shaft sleeve and the housing 30 of the locking and disconnecting device for radial support. Specifically, the first bearing 41 can be a needle bearing, and the second bearing 42 can be a ball bearing.

[0055] The second connecting member 37 is an output shaft sleeve, which is arranged at the right output end of the input shaft 2. The left end of the output shaft sleeve is movably connected to the second engaging sleeve 32, and the right end is connected to the output shaft through splines. A third bearing 43 is provided between the output shaft sleeve and the input shaft for radial support, and a fourth bearing 44 is provided between the output shaft sleeve and the housing 30 of the locking and disconnecting device for radial support. Both the third bearing 43 and the fourth bearing 44 can be ball bearings.

[0056] Furthermore, a first end face tooth is provided on one side of the first engaging sleeve 31 facing the first connecting member 36, and a third end face tooth meshing with the first end face tooth is provided on one side of the first connecting member 36 facing the first engaging sleeve 31.

[0057] In this embodiment, the first engaging sleeve 31 and the first connecting member 36 can be meshed and connected through an end face tooth structure. Specifically, a first end face tooth is provided on one side of the first engaging sleeve 31 facing the first connecting member 36, and a third end face tooth is provided on one side of the first connecting member 36 facing the first engaging sleeve 31. When the ends of the first engaging sleeve 31 and the first connecting member 36 are in contact, the first end face tooth and the third end face tooth can be meshed, so as to realize the connection between the first engaging sleeve 31 and the first connecting member 36 and realize power transmission.

[0058] By adopting the end face tooth structure, the bearing capacity of the system can be effectively improved within the specified space, and the problems that the actuator of the conventional disconnecting device is complicated and occupies a large space and is difficult to implement during the installation and matching process can be solved.

[0059] Furthermore, a second end face tooth is provided on one side of the second engaging sleeve 32 facing the second connecting member 37, and a fourth end face tooth meshing with the second end face tooth is provided on one side of the second connecting member 37 facing the second engaging sleeve 32.

[0060] In this embodiment, the second engaging sleeve 32 and the second connecting member 37 can also be meshed and connected through an end face tooth structure. Specifically, a second end face tooth is provided on one side of the second engaging sleeve 32 facing the second connecting member 37, and a fourth end face tooth is provided on one side of the second connecting member 37 facing the second engaging sleeve 32. When the ends of the second engaging sleeve 32 and the second connecting member 37 are in contact, the second end face tooth and the fourth end face tooth can be meshed, so as to realize the connection between the second engaging sleeve 32 and the second connecting member 37 and realize power transmission.

[0061] Furthermore, a first mounting portion 21 is provided on the input shaft 2, and the first mounting portion 21 is arranged on the side of the first engaging sleeve 31 away from the electromagnetic structure 33; the first elastic member includes a first spring 34, one end of the first spring 34 is connected to the first mounting portion 21, and the other end is connected to the first engaging sleeve 31.

[0062] As Figure 1 shown, for the convenience of installing the first elastic member, a first mounting portion 21 is provided on the input shaft 2. Specifically, in this embodiment, a circumferential boss is machined on the outer periphery of the input shaft 2 as the first mounting portion 21. The boss is located on the left side of the first coupling sleeve 31. The first elastic member is a first spring 34. One end of the first spring 34 is fixedly connected to the boss, and the other end is fixedly connected to the first coupling sleeve 31. When the electromagnetic structure 33 drives the first coupling sleeve 31 to slide leftward, the first spring 34 is compressed.

[0063] Furthermore, a second mounting portion 22 is provided on the input shaft 2. The second mounting portion 22 is provided on the side of the second coupling sleeve 32 close to the electromagnetic structure 33. The second elastic member includes a second spring 35. One end of the second spring 35 is connected to the second mounting portion 22, and the other end is connected to the second coupling sleeve 32.

[0064] For the convenience of installing the second elastic member, a second mounting portion 22 is provided on the input shaft 2. Specifically, in this embodiment, a second snap ring is installed on the outer periphery of the input shaft 2, and the second snap ring is used as the second mounting portion 22. The second snap ring is arranged on the left side of the second coupling sleeve 32. The second elastic member is a second spring 35. One end of the second spring 35 is fixedly connected to the second snap ring, and the other end is fixedly connected to the second coupling sleeve 32. When the electromagnetic structure 33 drives the second coupling sleeve 32 to slide leftward, the second spring 35 is compressed.

[0065] Furthermore, a limiting member 23 is further provided on the input shaft 2. The limiting member 23 is arranged on the side of the first coupling sleeve 31 close to the electromagnetic structure 33. The limiting member 23 is used for axially limiting the first coupling sleeve 31.

[0066] Specifically, for the convenience of positioning the first working position at the right end of the first coupling sleeve 31, a limiting member 23 is further provided on the right side of the first coupling sleeve 31. In this embodiment, the limiting member 23 is a third snap ring, and the third snap ring is fixed on the input shaft 2. When the electromagnetic structure 33 is not powered on, the right end face of the first coupling sleeve 31 just contacts the left end face of the third snap ring, and the second spring 35 is neither stretched nor compressed. When the second spring 35 pushes the first shaft sleeve to move rightward for resetting, the third snap ring can limit the moving distance of the first coupling sleeve 31 rightward to ensure accurate resetting.

[0067] Furthermore, the first coupling sleeve 31 is connected to the input shaft 2 by splines, and the second coupling sleeve 32 is connected to the input shaft 2 by splines.

[0068] In this embodiment, external splines are provided on the outer side of the input shaft 2, and internal splines are provided on the inner walls of the first engaging sleeve 31 and the second engaging sleeve 32. Through the cooperation of the internal and external splines, the first engaging sleeve 31 and the second engaging sleeve 32 can be fixed in the circumferential direction of the input shaft 2, ensuring no relative rotation between the two engaging sleeves and the input shaft 2, and at the same time realizing the axial sliding connection between the first engaging sleeve 31 and the input shaft 2, and between the second engaging sleeve 32 and the input shaft 2.

[0069] The integrated differential system described in the embodiment of the present application has three working modes, and the principles of the three working modes are as follows:

[0070] (1) Normal differential mode: Refer to Figure 2 , no current is passed through the electromagnetic structure 33, no magnetic field is generated, the first engaging sleeve 31 is in the first working position at the right end, the first engaging sleeve 31 is disconnected from the first connecting member 36 and the differential housing 1, the second engaging sleeve 32 is also in the first working position at the right end, the second engaging sleeve 32 is connected to the second connecting member 37 and the output shaft. At this time, both the first elastic member and the second elastic member are in the natural state, neither stretched nor compressed. The power is transmitted from the input shaft 2, the second engaging sleeve 32 to the output shaft, realizing the torque transmission function and meeting the normal differential requirement;

[0071] (2) Locking mode: This function is executed statically. Refer to Figure 3 , a positive current is passed through the electromagnetic structure 33, and the generated magnetic force repels the permanent magnetic structure on the first engaging sleeve 31, causing the first engaging sleeve 31 to move to the second working position at the left end against the elastic force of the first elastic member, and engaging with the first connecting member 36 to realize the connection between the first engaging sleeve 31 and the differential housing 1. At this time, the second engaging sleeve 32 is still in the first working position at the right end, and the second engaging sleeve 32 is connected to the second connecting member 37 and the output shaft. Further, the differential housing 1, the input shaft 2, the first engaging sleeve 31, the second engaging sleeve 32, and the output shaft are all locked, and the power is transmitted from the differential housing 1 to the input shaft 2 and the output shaft, realizing the locking function, which can assist the vehicle in getting out of trouble during off-road driving;

[0072] (3) Disconnection mode: Refer to Figure 4 , a reverse current is passed through the electromagnetic structure 33, and the generated magnetic force attracts the permanent magnetic structure on the second engaging sleeve 32, causing the second engaging sleeve 32 to move to the second working position at the left end against the elastic force of the second spring 35 and disconnect from the second connecting member 37 and the output shaft. At this time, the first engaging sleeve 31 is still in the first working position at the right end, and the first engaging sleeve 31 is disconnected from the first connecting member 36 and the differential housing 1. After the power is transmitted from the input shaft 2 to the first engaging sleeve 31 and the second engaging sleeve 32, it cannot continue to be transmitted to the output shaft, realizing power interruption. At this time, the motor can be in the shutdown state to reduce the excitation loss and energy consumption.

[0073] The integrated differential system described in the embodiments of the present application uses an electromagnetic structure to control two coupling sleeves, achieving two-way control, which can effectively reduce the total assembly cost. By using two coupling sleeves and each coupling sleeve realizing two working positions respectively, compared with the prior art method of using a single gear sleeve to realize three working positions, there is no problem of difficult positioning of the middle working position, and accurate positioning can be achieved. In addition, by using two coupling sleeves to form a combined system, in practical applications, it can be selected and configured according to the needs of customers, so that the product can realize two supply methods: single disconnection function and disconnection plus differential lock function, achieving cost reduction. For example, when only the disconnection function is required, corresponding components such as the first coupling sleeve and the first elastic member can be cancelled.

[0074] The embodiments of the present application also propose a vehicle, which includes the integrated differential system described above.

[0075] Due to the above differential system, the vehicle can realize three different working modes, which can cover the current customers' urban commuting and off-road needs, and improve the driving experience and customer satisfaction.

[0076] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated differential system, characterized in that, Comprising: A differential, an input shaft, a locking and disconnecting device, and an output shaft; The output end of the differential is connected to the input shaft, and the locking and disconnecting device is arranged between the input shaft and the output shaft; The locking and disconnecting device includes: a housing sleeved outside the input shaft; A first engaging sleeve and a second engaging sleeve, both sleeved on the input shaft and both capable of sliding axially relative to the input shaft. The first engaging sleeve is movably connected to the differential housing, and the second engaging sleeve is movably connected to the output shaft; a driving assembly installed inside the housing for driving the first engaging sleeve and the second engaging sleeve to slide axially along the input shaft, so that the first engaging sleeve is connected to or disconnected from the differential housing, and the second engaging sleeve is connected to or disconnected from the output shaft; The integrated differential system includes a first state, a second state, and a third state; in the first state, the first engaging sleeve is disconnected from the differential housing, and the second engaging sleeve is connected to the output shaft; in the second state, the first engaging sleeve is connected to the differential housing, and the second engaging sleeve is connected to the output shaft; in the third state, the first engaging sleeve is disconnected from the differential housing, and the second engaging sleeve is disconnected from the output shaft.

2. The integrated differential system according to claim 1, wherein: Permanent magnetic structures are provided on both the first engaging sleeve and the second engaging sleeve; The driving assembly includes: An electromagnetic structure installed inside the housing and located between the first engaging sleeve and the second engaging sleeve; the electromagnetic structure is used for driving the first engaging sleeve to slide towards the differential housing after a current in a first direction is passed, so that the first engaging sleeve is connected to the differential housing; or driving the second engaging sleeve to slide away from the output shaft after a current in a second direction is passed, so that the second engaging sleeve is disconnected from the output shaft; A first elastic member and a second elastic member, both installed on the input shaft; the first elastic member is connected to the first engaging sleeve and is used for driving the first engaging sleeve to slide away from the differential housing after the electromagnetic structure is powered off, so that the first engaging sleeve is disconnected from the differential housing; the second elastic member is connected to the second engaging sleeve and is used for driving the second engaging sleeve to slide towards the output shaft after the electromagnetic structure is powered off, so that the second engaging sleeve is connected to the output shaft.

3. The integrated differential system according to claim 1, wherein: A first connecting member is provided between the first engaging sleeve and the differential housing. One end of the first connecting member is connected to the differential housing, and the other end is movably connected to the first engaging sleeve; A second connecting member is provided between the second engaging sleeve and the output shaft. One end of the second connecting member is movably connected to the second engaging sleeve, and the other end is connected to the output shaft.

4. The integrated differential system according to claim 3, wherein: On one side of the first coupling sleeve facing the first connecting member, there are first end face teeth, and on one side of the first connecting member facing the first coupling sleeve, there are third end face teeth meshing with the first end face teeth.

5. The integrated differential system according to claim 3 or 4, wherein: On one side of the second coupling sleeve facing the second connecting member, there are second end face teeth, and on one side of the second connecting member facing the second coupling sleeve, there are fourth end face teeth meshing with the second end face teeth.

6. The integrated differential system according to claim 2, wherein: A first mounting portion is provided on the input shaft, and the first mounting portion is provided on a side of the first coupling sleeve away from the electromagnetic structure; The first elastic member includes a first spring, one end of the first spring is connected to the first mounting portion, and the other end is connected to the first coupling sleeve.

7. The integrated differential system according to claim 2 or 6, wherein: A second mounting portion is provided on the input shaft, and the second mounting portion is provided on a side of the second coupling sleeve close to the electromagnetic structure; The second elastic member includes a second spring, one end of the second spring is connected to the second mounting portion, and the other end is connected to the second coupling sleeve.

8. The integrated differential system according to claim 6, wherein: A limiting member is further provided on the input shaft, the limiting member is provided on a side of the first coupling sleeve close to the electromagnetic structure, and the limiting member is used for axially limiting the first coupling sleeve.

9. The integrated differential system according to claim 1, wherein: The first coupling sleeve is connected to the input shaft by splines, and the second coupling sleeve is connected to the input shaft by splines.

10. A vehicle, characterized in that, Including the integrated differential system according to any one of claims 1-9.

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